Chair for floor sleepers



Patented Sept. 8, 1925.

UNITED STATES GEORGE B. BOSCO, OF CHICAGO, ILLINOIS.

CHAIR FOR FLOOR SLEEPERS.

Ap lication'filed March 31, 1924. Serial No. 703,092.

To all to from it may concern:

Be it known that I, GEORGE B. Bosco, a citizen of the United States ofAmerica, and a resident of Chicago, county of Cook, and State ofIllinois, have invented a new and useful Improvement in Chairs for FloorSleepers, of which the following is a specification.

The main objects of this invention are to provide improved means forsupporting and anchoring fioor sleepers used in concrete constructionwork; to provide supporting and anchoring means of this kind which willpermit the pouring of all of the concrete in one operation instead oftwo pouring operations required with sleeper chairs heretofore in use;to provide an improved form of chair for floor sleeperswhich will permitall of the sleepers to be accurately set up and alined, ready foruse,before the concrete slab is poured; to provide a sleeper chair which isdurable in construction, inexpensive to manufacture, and which may bereadily set up even by unskilled labor; and to provide an improvedmethod of mounting floor sleepers in concrete floor slabs.

An illustrative embodiment of this invention is shown in theaccompanying drawings, wherein:

Figure 1 is a side elevation of one of the chairs; the sleeper, floor,concrete slab, and mold being shown in section.

Fig. 2 is a vertical section of the floor slab showing a plurality ofthe chairs arranged in staggered relation; the sleeper and chairs beingshown in elevation.

Fig. 3 is an enlarged perspective of one of the chairs.

Fig. 4 is a transverse section of the same, taken on the line 4:t ofFig. 3.

Heretofore, two principal methods have been used in laying concretefloor slabs wherein the floor sleepers are anchored in the concrete. Inthe first method, after the concrete has been poured into the mold andbefore it has had a chance to set or become hard, anchors for the floorsleepers are laid. in the top of the wet concrete. Then, after the firstpouring of concrete has thoroughly set, the sleepers are laid on theanchors and secured thereto. After the sleepers have been leveled,additional concrete is poured on top of the first slab so as to embedall of the anchors and partially embed the sleepers to prevent theirwithdrawal. This top slab of concrete merely rests on top of the bottomslab and is a dead weight to the floor. Th s method of laying floors isvery unsatisfactory and involves a large amount of time and expense. Theanchors must be placed on the rough concrete with great care in order tohave them all on a level. If the anchors are not properly laid, it isdiificult to bring all the sleepers to a level for laying the finishedfloor.

In the other old method above mentioned, the rough concrete is moldedand after the concrete has partially set, the floor sleepers are laid ontop of the slab and nailed there to. Additional concrete is then pouredon ,top of the first slab so as to partially embed the sleepers. Thismethod is also very unsatisfactory because if the first slab of concreteis set too hard, the nails cannot be driven into it, and if it is nothard enough the nails will not hold sufficiently to properly anchor thesleepers. Also, the additional slab of concrete is expensive and ismerely a dead weight on the floor without adding any strength to thestructure.

Applicants improved method involves the use of a sleeper chair which isdirectly supported on the form so that the chairs and sleepers may allbe set up before any of the concrete is poured. All of the concrete isthen poured in one operation so as to make a single floor slab whichembeds the chairs and partially embeds the sleepers. This method ofsetting up the chairs and sleepers before pouring the concrete permitsthe sleepers also to be used for supporting temporary runways over whichthe buggies may be trundled when the concrete is poured.

In the specific construction herein shown, the invention involves theuse of a plurality of chairs 1 supported in an upright position on thebottom of a form 2, for anchoring a plurality of floor sleepers 3supported on the upper ends thereof and on which the floor 4 is laidafter the concrete has been poured and properly set to form the floorslab 5.

As herein illustrated, the chair 1 is channel-shaped to provide acentral web 6 and side flanges forming legs 7 and 8 arranged to permitthe chair to stand on the form 2 in an upright position. These channelsare preferably stamped out of sheet metal. To facilitate the leveling ofthe lower edges of the legs 7 and 8, the web 6 is recessed at its loweredge as shown at 9. Formed in the leg 7 adjacent the lower end of thechair, is an aperture 10 for receiving a nail 11 whereby the chairs aretoed to the form 2 for holding them in an upright position during thepouring of the concrete.

The upper edges of the web 6 and leg 8 form a hearing 12 for supportingthe sleepers 3. The flange 7 projects beyond the upper edge 12 of thechair to form a lug 13, which is adapted to be bent into position tooverlap the sleeper 3. Formed in the lug 18, is a pair of apertures 14for receiving nails 15, or othersuitable fastening means Which aredriven into the sleeper 3 for securing the sleeper to the chair.

The sleepers 3 are Wooden strips arranged in parallel spaced relation toform a supporting grid for the floor boards 1.

In operation, after the form 2 has been set up, the chairs 1 are nailedto the sleepers 3. The chairs are spaced apart at regular intervalsalong the sleepers and are alternately arranged so that the lugs 13 aredisposed alternaitely on opposite sides of the sleeper The chairs arethen set up on the bottom of the form 2 and toed thereto by nails 11.

Planks, not shown, may then be laid loosely across the sleepers to forma temporary runway over which the buggies of concrete may be wheeled;The form is filled with concrete to a level above the chairs so as tocompletely embed the chairs and partly embed the sleepers, as shown inFigures 1 and 2. When the concrete is properly set, the form 2 isremoved and the projecting ends of the nails 11 may be clipped off. Thefloor boards 4: are then laid on top of the sleepers.

Although but one specific embodiment of this invention has been hereinshown and described, it will be understood that numerous details of theconstruction shown may be altered or omitted Without departing from thespirit of this invention as defined by the following claim.

I claim:

A device of the class described for use in supporting and anchoringfloor sleepers, comprising a channel-shaped chair adapted to besupported on end in an upright position on the form of a floor slab,said chair having an aperture formed in one leg thereof adjacent itslower end to receive a nail for securing said chair to the form, and alug projecting beyond the upper end of said chair and having an aperturetherein to receive a. nail for attachment to a sleeper.

Signed at Chicago this 27 day of March,

GEORGE B. BOSCO.

